CN110016565A - The method for producing AL-Si-Fe alloy as raw material coreless armature feeding using waste refractory materials - Google Patents

Abstract

The invention provides a method for preparing aluminum-silicon ferroalloy by using waste refractory material as raw material and hollow electrode feeding. The content of aluminum in the raw material is adjusted by using diatomite waste residue as an additive to adjust the content of silicon in the raw material, and the materials mainly composed of alumina and silicon oxide are reduced at high temperature in an electric arc furnace to prepare a certain composition of aluminum-silicon-ferroalloy; the hollow electrode is used to transport the powder. materials, can strengthen the entire electric arc furnace smelting process, promote the reduction of oxides and the volatilization of fluorides, especially the decomposition of toxic substances cyanide, as well as the volatilization and recovery of fluorides, chlorides and alkali metals in materials, and improve production efficiency , reduce production costs, and realize the comprehensive utilization of various hazardous wastes and solid wastes in the same process.

Description

Method for preparing Al-Si-Fe alloy by feeding hollow electrode with waste refractory material

technical field

The invention relates to the field of electrometallurgy, in particular to a method for preparing an aluminum-silicon-iron alloy by using waste refractory materials as a raw material for feeding hollow electrodes.

Background technique

The production methods of ferrosilicon are mainly divided into metal fusion method and electrothermal reduction method. The metal fusion method is to use pure metal aluminum, silicon and iron in a certain proportion to form an alloy in a molten state; the electrothermal reduction method uses oxides containing aluminum, silicon and iron as raw materials, and carbonaceous materials as raw materials. Reducing agent, the alloy is prepared by reduction and smelting in an electric arc furnace. Among them, the metal fusion method has the problems of reheating of pure metal, secondary burning loss and high production cost. The electrothermal reduction method also has problems such as shortage of pure mineral raw materials and poor economical production process.

Aluminum electrolysis cell is the main equipment for producing metal aluminum. After the aluminum electrolytic cell is damaged and overhauled, a large amount of electrolytic cell overhaul slag will be produced. The overhaul slag is composed of cathode carbon block, cathode paste, refractory brick, thermal insulation brick, anti-seepage material and thermal insulation board. Further, the overhaul slag can be divided into two main parts: waste refractory lining (impermeable material, refractory brick, insulation brick) and waste cathode carbon block (cathode carbon block, cathode paste) eroded by fluoride salt electrolyte, while waste cathode The mass ratio of carbon block and waste refractory material is about 50%. At present, 5-10kg of waste cathode carbon blocks and 5-10kg of waste refractory materials are produced for every ton of metal aluminum produced.

The waste refractories are mainly waste dry anti-seepage materials located at the lower part of the cathode carbon block, accounting for about 90% of the waste refractories. The main components of the dry anti-seepage material are alumina and silicon oxide, and the main components of the waste anti-seepage material after being penetrated and eroded by the electrolyte are nepheline (NaAlSiO ₄ ) or albite (NaAlSi ₃ O ₈ ), in addition to containing 10 -15% fluoride electrolyte, iron oxide, calcium oxide, aluminum carbide and other oxides and carbide impurities and a small amount of aluminum, silicon, aluminum silicon iron and other metals and alloys. Since these waste refractories also contain more fluorides, they are also classified as hazardous waste. At present, the waste refractory materials generated during the overhaul of aluminum electrolytic cells have not been effectively recovered and treated, and are generally treated by landfills. Since waste refractories contain a lot of soluble substances such as electrolyte fluoride and sodium oxide, long-term stacking will cause great harm to groundwater and the surrounding environment.

The main component of the waste cathode carbon block is carbonaceous material, except for the carbonaceous material, the most component is the electrolyte. The electrolyte components in the waste cathode carbon block mainly include NaF, Na ₃ AlF ₆ , Na ₅ Al ₃ F ₁₄ and CaF ₂ . The carbon content in the aluminum electrolysis waste cathode carbon block is generally 60%-70%, and the electrolyte component content is 15-25%. In addition, 4%-8% of alkali metals, mainly sodium metal, are present in aluminum electrolysis waste cathodes. When potassium salt is present in the electrolyte composition, metallic potassium is also present in the spent cathode carbon block. In addition to the above three main components, the waste cathode carbon block also contains a small amount of carbides, nitrides, oxides and cyanide, wherein the cyanide content accounts for about 0.1%-0.2% of the total mass of the waste cathode carbon. NaCN, complex cyanides and fluorides in spent cathode carbon blocks are the main factors that harm the environment. Cyanide and most fluorides are soluble in water, and the long-term accumulation of waste cathode carbon blocks will pollute groundwater and surface water, causing serious pollution to the environment. The treatment of waste cathode carbon blocks in aluminum electrolysis cells is divided into two categories. One is treatment technology. Even if the waste cathode carbon block materials are harmless and then landfilled or used by other industries, such as high-temperature hydrolysis technology, combustion power generation technology, The production of slagging agent for high-speed rail industry, used as fuel and mineral raw materials in the cement industry, converted into inert materials that can be landfilled, etc.; the other type is recycling technology, mainly to recover fluoride and carbon in waste cathode carbon blocks, For example, fluoride is recovered by wet leaching, used as an additive for cathode and anode carbon blocks, and flotation is used to separate fluoride electrolyte and carbon blocks, but the current treatment of waste cathode carbon blocks has not yet reached the industrialized level.

Every ton of coal burned will produce 0.15-0.3 tons of fly ash, and coal with high ash content will produce up to 0.4-0.5 tons of fly ash. At present, my country's annual production of fly ash reaches more than 600 million tons. A small amount of high-alumina fly ash can be used to extract alumina, while a large amount of low-aluminum fly ash is mainly used in the production of various building materials, such as cement admixtures, concrete additives and building materials deep-processing products, as well as extraction from fly ash Floating beads are used to produce refractory and thermal insulation materials, but these methods cannot fundamentally solve the problem of fly ash utilization. In addition, the added value of producing building materials is low, and the enterprises that use them must be close to large cities with large populations. Therefore, this method of utilization is mainly used in the eastern provinces of my country. However, the fly ash distributed in Shanxi, Inner Mongolia, Ningxia, Shaanxi, Gansu and Xinjiang has not been effectively utilized, and most of them are still disposed of by stacking and landfilling.

The rolls of aluminum processing enterprises need to be cooled and lubricated with rolling oil during the production process. The rolling oil needs to be filtered after a period of use, and the filter medium is made of diatomite. In the process of aluminum rolling, because the aluminum is soft, the wear of the roll is less, so the impurities in the rolling oil mainly come from the wear powder of the aluminum. When the diatomite has been used for a certain period of time, when the filtration accuracy cannot reach the standard of rolling oil, it needs to be replaced regularly. The replaced oily waste diatomite is regarded as hazardous waste, which not only poses the risk of environmental pollution, but also causes a great waste of resources. The main components of diatomite in my country are silica, alumina and iron oxide. At present, the diatomite waste residue produced by filtering rolling oil in aluminum processing plants mainly contains rolling oil and aluminum powder. The rolling oil can be deoiled with a degreaser, and the removed oil can be used to produce kerosene, while the diatomite waste residue is still No effective treatment was given.

It can be seen from the above analysis that the hazardous waste and solid waste generated by the current electrolytic aluminum, aluminum processing and power industries are treated separately, most of which are in the stage of harmless treatment, and the effective resource utilization is still in the research stage. As a result, the environmental pollution problem of these solid wastes has not been fundamentally solved.

SUMMARY OF THE INVENTION

The invention provides a method for preparing aluminum-silicon ferroalloy by using waste refractory material as raw material for feeding hollow electrodes. The aluminum content and silicon content in the raw materials are reduced in an electric arc furnace at high temperature to reduce materials mainly composed of alumina and silicon oxide to prepare a certain composition of aluminum-silicon-ferroalloy; in the high-temperature reduction process, the decomposition of cyanide in the waste cathode carbon block is realized, and The volatilization and recovery of fluoride and alkali metals in the material realize the comprehensive utilization of various hazardous wastes and solid wastes in the same process. In order to achieve the above object, the present invention adopts the following technical solutions:

The method for preparing Al-Si-Fe alloy by using waste refractory material as raw material hollow electrode feeding comprises the following steps:

Step 1, the waste refractory material, waste cathode carbon block and fly ash in the aluminum electrolytic cell overhaul slag are respectively made into powder;

Step 2: Determine the consumption of the waste refractory material, fly ash and waste cathode carbon block according to the composition of the target Al-Si-Fe alloy, and use the fixed carbon contained in the waste cathode carbon block as the reducing agent to calculate and reduce the Al in the waste refractory material according to the stoichiometric ratio. The amount of metal aluminum and silicon produced by ₂ O ₃ , SiO ₂ oxides, and then calculate the amount of metal aluminum and silicon obtained by reducing Al ₂ O ₃ and SiO ₂ oxides in fly ash with waste cathode carbon block, and use reduction The amount of aluminum and silicon obtained from the fly ash is adjusted to the amount of metal aluminum and silicon obtained by reducing the waste refractory material to obtain the composition of aluminum and silicon in the prepared aluminum-silicon ferroalloy, as well as the waste refractory material, fly ash and waste cathode. The amount of carbon block; the waste refractory material, fly ash and waste cathode carbon block powder are put into the mixer together and mixed evenly;

Step 3, start the electric arc furnace, and gradually increase the temperature in the furnace, the electrodes used in the electric arc furnace are hollow electrodes, and the hollow channel in the middle of the electrode is connected with the compressed gas pipeline for conveying powder materials. When the temperature of the bottom arc zone is 1700 At -2100 °C, the powdered material is sent to the arc reaction zone through the hollow channel with the compressed gas as the carrier. When the smelting process reaches 2-6 hours, the formed Al-Si-Fe alloy melt is released from the bottom of the electric arc furnace and refined outside the furnace, that is, Al-Si-Fe alloy can be obtained, which can be used as steel-making deoxidizer and magnesium-smelting reducing agent, and the refining slag is returned to the batching process for continued use;

In step 4, the soot collected from the top of the electric arc furnace is immersed and filtered, the leaching temperature is 20-100°C, the liquid-solid ratio in the leaching process is 2-10:1, the leaching time is 0.5-3h, and the leaching solution is filtered after leaching. Sodium carbonate is recovered by evaporation, and the leaching slag is melted at high temperature after drying, and the melting temperature is not lower than 1000 ° C, so that the fluoride and oxide are separated, the recovered fluoride electrolyte is returned to the electrolyzer for use, and the slag phase oxide is returned to the raw material of the electric arc furnace The batching workshop is used as the raw material for electric arc furnace smelting of aluminum ferrosilicon.

The composition of the above-mentioned waste refractory material is: Na ₂ O 5-30%, Al ₂ O ₃ 15-50%, SiO ₂ 10-50%, Fe ₂ O ₃ ≤ 10%, K ₂ O ≤ 3%, CaO≤3%, F≤10%.

The composition of the above-mentioned waste cathode carbon block by mass ratio is: C 60-80%, Al ₂ O ₃ 0-3%, Na 4-10%, fluoride electrolyte 10-20%, fluoride electrolyte is mainly cryolite, fluorine Sodium and calcium fluoride, and possibly lithium and potassium fluoride.

The composition of the above fly ash by mass ratio is: Al ₂ O ₃ 15-50%, SiO ₂ 30-50%, Fe ₂ O ₃ 0-10%, CaO≤5%, MgO≤5%, _Na2O≤ 3%, K ₂ O ≤ 3%, TiO ₂ ≤ 3%, and the content of other single metal oxides is less than 1%.

The composition of the above dry pulp powder is as follows: calcium lignosulfonate ≥ 90%, dry basis moisture ≥ 8%.

In the above step 1, the particle sizes of the waste refractory materials, waste cathode carbon blocks, fly ash and diatomite waste residue powder are all less than 100 mesh.

In the above step 3, the diameter of the hollow channel in the middle of the electrode is 20mm-200mm.

In the above step 3, the compressed gas is one of argon, air and carbon monoxide.

In the above step 3, the pressure of the compressed gas is controlled between 0.1-0.8MPa.

In the above step 3, the refining agent used in the out-of-furnace refining contains sodium chloride, potassium chloride and cryolite. ~1500℃.

Compared with the prior art, the beneficial effects of the present invention are:

1. The current waste refractory materials, waste cathode carbon blocks and fly ash are all processed separately, that is to say, a variety of processes and multiple sets of treatment systems are used. Among them, the treatment of waste refractory materials is generally landfill or harmless treatment before stacking. The treatment process of waste cathode carbon block is divided into wet method and fire method, and the wet method is the main method. Both use strong acid or strong alkali for leaching, so that fluoride is converted into soluble hydrogen fluoride or sodium fluoride and separated from carbonaceous materials. The treatment process also produces a large amount of acid or alkali-containing wastewater, which is likely to cause secondary pollution. The invention is an integrated treatment technology developed for various hazardous wastes and solid wastes. The waste refractory materials, waste cathode carbon blocks and fly ash are all processed and recovered in an electrothermal carbon reduction process. In the carbothermic reduction process, not only the high-temperature decomposition of the main toxic substance cyanide, but also the high-temperature volatilization and separation of the fluoride in the waste refractory material and the waste cathode carbon block is realized. Metal oxides are reduced into Al-Si-Fe alloy, and there is no generation of waste residue and waste water in the whole process, which is a green and environmentally friendly treatment process.

2. In the prior art, when dealing with hazardous wastes such as waste refractory materials and waste cathode carbon blocks, it is mainly based on innocence and reduction. Resource utilization of materials, that is, the fixed carbon in the waste cathode carbon block is used as a reducing agent to reduce the alumina, silica, iron oxide, etc. in the waste refractory, diatomite waste residue and fly ash in the form of metal, At the same time, fluoride and alkali metal are also recycled, and the waste treatment is realized, and the whole process is a closed loop.

3. Using secondary waste refractory materials as raw materials and fly ash as additives to adjust the aluminum content and silicon content in the raw materials, this batching method not only utilizes a variety of wastes, but also makes it easy to prepare aluminum-silicon-ferroalloys of various components , and then adapt to the smelting process of the electric arc furnace, making the smelting process and alloy composition easy to control, which is beneficial to reduce the production cost, and also creates conditions for subsequent processing.

4. The use of hollow electrodes to transport powdery materials can strengthen the entire electric arc furnace smelting process, promote the reduction of oxides and the volatilization of fluorides, especially the decomposition of toxic cyanide, improve production efficiency and reduce production costs.

Description of drawings

Fig. 1 is the process flow diagram of the method for preparing Al-Si-Fe alloy by using waste refractory material as raw material hollow electrode feeding according to the present invention.

Detailed ways

Taking the following wastes as an example, the technical solution of the present invention is explained in detail.

Table 1 shows the main components of a waste refractory material. Due to the difference in the electrolysis process and electrolyte composition, as well as the life of the electrolytic cell, the composition and content of waste refractories from different enterprises are different.

Table 1 Main components of a waste refractory material

Table 2 shows the main components of a waste cathode carbon block. Due to the difference in electrolysis process and electrolyte composition, as well as the life of the electrolytic cell, the composition and content of waste cathode carbon blocks from different enterprises are different.

Table 2 Main components of a kind of waste cathode carbon block

Table 3 shows the main components of a low-aluminum fly ash.

Table 3 Main components of a kind of low-aluminum fly ash

Example 1

The method for preparing Al-Si-Fe alloy by using waste refractory material as raw material hollow electrode feeding comprises the following steps:

Step 1, the waste refractory material, waste cathode carbon block, and fly ash in the aluminum electrolytic cell overhaul slag are respectively made into powder, and the particle size is 100 meshes;

Step 2, according to the composition of the target Al-Si-Fe alloy: the content of aluminum is 25%, the content of silicon is 65%, and the rest are iron, calcium, titanium and other trace metals, and the fixed carbon contained in the waste cathode carbon block is used as the reducing agent. The mass ratio of waste refractories, waste cathode carbon blocks, and fly ash required to reduce metal oxides is calculated by the metering ratio. Finally, the mass ratio of waste refractories, fly ash and waste cathode carbon blocks is 1:6:4. The waste refractory material, waste cathode carbon block and fly ash are put into the mixer and mixed evenly;

Step 3, start the electric arc furnace, and gradually increase the temperature in the furnace, the electrodes used in the electric arc furnace are hollow electrodes, and the hollow channel in the middle of the electrode is connected with the compressed gas pipeline for conveying powder materials. When the temperature of the bottom arc zone is 2100 When the temperature is ℃, the powdered material is sent to the arc reaction zone through the hollow channel with compressed air as the carrier. When the smelting process reaches 6 hours, the formed Al-Si-Fe alloy melt is released from the bottom of the electric arc furnace and refined outside the furnace; The diameter is 200mm, the pressure is controlled at 0.1MPa, the refining agent used contains sodium chloride, potassium chloride and cryolite, and the proportions of each component are 50% sodium chloride, 40% potassium chloride, and 10% cryolite; refining temperature 1500 ℃, the Al-Si-Fe alloy can be obtained, which can be used as a deoxidizer for steelmaking and a reducing agent for magnesium-smelting, and the refining slag is returned to the batching process for continued use;

In step 4, the soot collected from the top of the electric arc furnace is subjected to water leaching and filtration, the leaching temperature is 95°C, the liquid-solid ratio of the leaching process is 10:1, the leaching time is 0.5h, and the leaching solution is filtered after leaching, and the leaching solution is evaporated to recover sodium carbonate ; The leaching slag is melted at high temperature after drying, and the melting temperature is 1200 ℃, so that the fluoride and the oxide are separated, the recovered fluoride electrolyte is returned to the electrolyzer for use, and the slag phase oxide is returned to the electric arc furnace raw material batching workshop as the electric arc furnace for aluminum smelting Raw material of ferrosilicon.

Example 2

The method for preparing Al-Si-Fe alloy by using waste refractory material as raw material hollow electrode feeding comprises the following steps:

Step 1, the waste refractory material, waste cathode carbon block, and fly ash in the aluminum electrolytic cell overhaul slag are respectively made into powder, and the particle size is 100 meshes;

Step 2, according to the composition of the target Al-Si-Fe alloy: the content of aluminum is 27%, the content of silicon is 63%, and the rest are iron, calcium, titanium and other trace metals; the fixed carbon contained in the waste cathode carbon block is used as the reducing agent according to the chemical method. Calculate the mass of waste refractory material, fly ash, and waste cathode carbon block required for the reduction of metal oxides by metering ratio, and obtain the mass ratio of waste refractory material, fly ash and waste cathode carbon block to be 1:3:2; The refractory material, waste cathode carbon block and fly ash are put into the mixer and mixed evenly;

Step 3: Start the electric arc furnace and gradually increase the temperature in the furnace. The electrode used in the electric arc furnace is a hollow electrode, and the hollow channel in the middle of the electrode is connected with the compressed gas pipeline for conveying powdery materials. When the temperature of the bottom arc zone is 19000 When the temperature is ℃, the powdered material is sent to the arc reaction zone through the hollow channel with compressed argon gas as the carrier. When the smelting process reaches 4 hours, the formed Al-Si-Fe alloy melt is released from the bottom of the electric arc furnace and refined outside the furnace; the hollow channel The diameter is 100mm, and the pressure is controlled at 0.4MPa; the refining agent used contains sodium chloride, potassium chloride and cryolite, and the proportions of the components are 40% sodium chloride, 40% potassium chloride, and 20% cryolite; refining temperature 1200℃, Al-Si-Fe alloy can be obtained; the alloy can be used as deoxidizer for steelmaking and reducing agent for magnesium-smelting, and the refining slag is returned to the batching process for continued use;

In step 4, the soot collected from the top of the electric arc furnace is subjected to water leaching and filtration, the leaching temperature is 60°C, the liquid-solid ratio of the leaching process is 6:1, the leaching time is 1.5h, and the leaching solution is filtered after leaching, and the leaching solution is evaporated to recover sodium carbonate , the leaching slag is melted at high temperature after drying, and the melting temperature is 1100 ℃, so that the fluoride and the oxide are separated, the recovered fluoride electrolyte is returned to the electrolyzer for use, and the slag phase oxide is returned to the electric arc furnace raw material batching workshop as the electric arc furnace to smelt aluminum and silicon raw material of iron.

Example 3

The method for preparing Al-Si-Fe alloy by using waste refractory material as raw material hollow electrode feeding comprises the following steps:

Step 1, the waste refractory material, waste cathode carbon block, and fly ash in the aluminum electrolytic cell overhaul slag are respectively made into powder, and the particle size is 100 meshes;

Step 2, according to the composition of the target Al-Si-Fe alloy: the content of aluminum is 31%, the content of silicon is 58%, and the rest are iron, calcium, titanium and other trace metals; the fixed carbon contained in the waste cathode carbon block is used as the reducing agent according to the chemical method. Calculate the mass of waste refractory material, fly ash, and waste cathode carbon block required to reduce metal oxides by metering ratio, and obtain the mass ratio of waste refractory material, fly ash and waste cathode carbon block to be 1:1:1; The refractory material, waste cathode carbon block and fly ash are put into the mixer and mixed evenly;

Step 3, start the electric arc furnace, and gradually increase the temperature in the furnace, the electrodes used in the electric arc furnace are hollow electrodes, and the hollow channel in the middle of the electrode is connected with the compressed gas pipeline for conveying powder materials. When the temperature of the bottom arc zone is 1700 When the temperature is ℃, the powdered material is sent to the arc reaction zone through the hollow channel with compressed carbon monoxide gas as the carrier. When the smelting process reaches 2 hours, the formed aluminum-silicon-ferroalloy melt is released from the bottom of the electric arc furnace and refined outside the furnace; the hollow channel The diameter is 20mm, and the pressure is controlled at 0.8MPa; the refining agent used contains sodium chloride, potassium chloride and cryolite, and the proportions of each component are 60% sodium chloride, 10% potassium chloride, and 30% cryolite; refining temperature At 900 °C, an Al-Si-Fe alloy can be obtained, which can be used as a deoxidizer for steelmaking and a reducing agent for magnesium-smelting, and the refining slag is returned to the batching process for continued use;

In step 4, the soot collected from the top of the electric arc furnace is subjected to water leaching and filtration, the leaching temperature is 20°C, the liquid-solid ratio of the leaching process is 2:1, the leaching time is 3h, and the leaching solution is filtered after leaching, and the leaching solution is evaporated to recover sodium carbonate, The leaching slag is melted at high temperature after drying, and the melting temperature is 1000 °C, so that the fluoride and oxide are separated, the recovered fluoride electrolyte is returned to the electrolytic cell, and the slag phase oxide is returned to the electric arc furnace raw material batching workshop as the electric arc furnace to smelt aluminum-silicon ferrosilicon. raw materials.

Claims (10)

1. the method for producing AL-Si-Fe alloy as raw material coreless armature feeding using waste refractory materials, which is characterized in that including as follows Step:

Step 1, powder is respectively prepared with waste cathode carbon block, flyash in the waste refractory materials in aluminium cell slag from delining；

Step 2, the dosage of waste refractory materials, flyash and waste cathode carbon block is determined according to the ingredient of target AL-Si-Fe alloy, with Contained fixed carbon is that reducing agent stoichiometrically calculates Al in reduction waste refractory materials in waste cathode carbon block₂O₃、SiO₂Oxide The amount of the metallic aluminium of generation, silicon, then calculate with Al in waste cathode carbon block reduction flyash₂O₃、SiO₂The obtained metal of oxide The amount of aluminium, silicon, the amount of the aluminium obtained with reduction flyash, the metallic aluminium that silicon amount allotment reduction waste refractory materials obtain, silicon Obtain aluminium, the ingredient of silicon and the dosage of waste refractory materials, flyash and waste cathode carbon block in prepared AL-Si-Fe alloy； Waste refractory materials, flyash and waste cathode carbon block powder are put into togerther in blender and are uniformly mixed；

Step 3, start electric arc furnaces, and in-furnace temperature is gradually increased, the electrode that the electric arc furnaces uses is coreless armature, electrode Intermediate hollow passageway is connected with the compressed gas pipeline of conveying powder material, when bottom arc area temperature is 1700-2100 DEG C, Granular material is sent to electric arc reaction area through hollow passageway using compressed gas as carrier, from electric arc after fusion process reaches 2-6h Furnace bottom releases the AL-Si-Fe alloy melt to be formed and carries out external refining, AL-Si-Fe alloy can be obtained, which can be used as Deoxidizer in steel production and magnesium smelting reducing agent, refining slag return to burden process and continue to use；

Step 4, by from electric arc furnaces collected overhead to cigarette ash water logging and filter, extraction temperature is 20~100 DEG C, is leached Journey liquid-solid ratio is 2~10:1, and extraction time is 0.5~3h, is filtered after leaching, and leachate is leached by evaporation recycling sodium carbonate Slag carries out high temperature melting after the drying, and fusion temperature is not less than 1000 DEG C, so that fluoride is separated with oxide, the fluorination of recycling Object electrolyte returns to electrolytic cell and uses, and slag phase oxide returns to electric arc furnaces feed proportioning workshop as electric arc furnace smelting ferro-silicon-aluminium Raw material.

2. the method according to claim 1 for producing AL-Si-Fe alloy as raw material coreless armature feeding using waste refractory materials, It is characterized in that, the ingredient of waste refractory materials is in mass ratio are as follows: Na₂O 5~30%, Al₂O₃15~50%, SiO₂10~ 50%, Fe₂O₃≤ 10%, K₂O≤3%, CaO≤3%, F≤10%.

3. the method according to claim 1 for producing AL-Si-Fe alloy as raw material coreless armature feeding using waste refractory materials, It is characterized in that, the ingredient of waste cathode carbon block is in mass ratio are as follows: C 60~80%, Al₂O₃0~3%, Na 4~10%, fluorination Object electrolyte 10~20%.

4. the method according to claim 1 for producing AL-Si-Fe alloy as raw material coreless armature feeding using waste refractory materials, It is characterized in that, fine coal ash composition is in mass ratio are as follows: Al₂O₃15~50%, SiO₂30~50%, Fe₂O₃≤ 10%, CaO ≤ 5%, MgO≤5%, Na₂O≤3%, K₂O≤3%, TiO₂≤ 3%, other single metal oxide contents are less than 1%.

5. the method according to claim 1 for producing AL-Si-Fe alloy as raw material coreless armature feeding using waste refractory materials, It is characterized in that, the ingredient of diatomite waste residue is in mass ratio are as follows: calcium lignosulfonate >=90%, butt moisture >=8%.

6. the method according to claim 1 for producing AL-Si-Fe alloy as raw material coreless armature feeding using waste refractory materials, It is characterized in that, step 1, the waste refractory materials, waste cathode carbon block, flyash and diatomite waste residue powder granularity are respectively less than 100 mesh.

7. the method according to claim 1 for producing AL-Si-Fe alloy as raw material coreless armature feeding using waste refractory materials, It is characterized in that, step 3, the diameter in the electrode central hollow channel is 20mm-200mm.

8. the method according to claim 1 for producing AL-Si-Fe alloy as raw material coreless armature feeding using waste refractory materials, It is characterized in that, step 3, the compressed gas is one of argon gas, air, carbon monoxide.

9. the method according to claim 1 for producing AL-Si-Fe alloy as raw material coreless armature feeding using waste refractory materials, It is characterized in that, step 3, the pressure of the compressed gas is controlled between 0.1-0.8MPa.

10. the method according to claim 1 for producing AL-Si-Fe alloy as raw material coreless armature feeding using waste refractory materials, It is characterized in that, step 3, refining agent used in external refining contains sodium chloride, potassium chloride and ice crystal, each component ratio range chlorine Change sodium 30~60%, potassium chloride≤30%, ice crystal≤30%；900~1500 DEG C of refining temperature.